Home / 78,389.55-108,178.00-42,579.86

Finding the Fourth Proportional to 78,389.55, 108,178.00 and 42,579.86

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Solution

The fourth proportional to 78,389.55, 108,178.00 and 42,579.86 is: 58,760.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,389.55 : 108,178.00 = 42,579.86 : x
  2. Step 2: Convert to fraction form
    78,389.55/108,178.00 = 42,579.86/x
  3. Step 3: Cross multiply
    78,389.55x = 108,178.00 × 42,579.86
  4. Step 4: Simplify right side
    78,389.55x = 4,606,203,447.74
  5. Step 5: Solve for x
    x = 4,606,203,447.74/78,389.55
  6. Step 6: Final answer
    x = 58,760.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.